js_syntax_functions.md

String to number

Even in Javascript, it's sometimes usefull to convert a String to a number (especially in combination with typescript)

let x = '1'
+x --> 1
x = 'a'
+x --> NaN

Arrow functions

[1,2,3].forEach((x) => {
  console.log(x)
})

Has the same this, arguments, super or new.target as in the context outside.

Regular functions

[1,2,3].forEach(function(x) {
  console.log(x)
})